William trabue



(No Model.)

W. TRABUE.

SAW SETTING DEVICE.

No. 398,357. Patented Peb. 19, 1889.

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UNITED STATES PATENT rrIcE.

VILLIAM TRABUE, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF TWO-THIRDS TO WV.YV. BARNES AND GUY O. SIBLEY, BOTHOF SAME PLACE.

SAW-SETTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 398,35*?, datedFebruary 19, 1889.

Application iiled November 12, 1888. Serial No. 290,601. (No model.)

To @ZZ whom it may concern.-

Be it known` that I, WILLIAM TRABUE, a citizen ofthe United States, anda resident of Louisville, in the county of Jeiferson and State ofKentucky', have invented certain new and useful Improvemen ts inAutomatic Saw- Sets; and I do declare the following to be a full, clear,and exact description of the in vention, such as will enable othersskilled in the Io art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which form a part of thisspecitication.

Figure l of the drawings is a representa`V tion of a perspective view ofthis invention. Fig. 2 is a side view of the same. Figs. 3, '4, and 5are details of the construction.

This invention relates to improvements in 2o automatic saw-sets; and itconsists in the construction and novel combination of parts, ashereinafter set forth, and pointed out in the claims.

Referring by letter to the drawings, A des- 2 5 ignates the side platehaving the bearings B in its transverse upper portion for the journalsof the roller C, which has the annular cam-groove u therein. The saidgroove uv has the opposite straight portions and the opposite cam or Vshaped portions b, which are designed to throw the set-disk to the rightand left, as hereinafter explained, when the said roller is revolved bymeans of a crank on the outer end of the extended journal c.

3 5 D is a guide-plate, between which and the inner face of t-he sideplate, A, the saw-blade is designed to slide. The plate D has at-hreaded bolt, d, standing at right angles thereto and passing throughan opening in the side plate,

4o where it is engaged by a thumb-nut, E, having an annular flange, e,on its inner end engaging in the groove f, formed in the bracket F onthe side plat-e, which prevents longitudinal movement of the nut, sothat the nut turning on the screw will adjust the plate D to thethickness of the saw-blade.

G is a slide or bar, which is preferablygraduated, seated and movingin-a groove in the bed-plate H, which projects laterally from the 5olower edge of the plate D, and l is a collar or yoke secured at anydesired point on the bar G by means of the thumb-screw g, and having arearward extension-piece, J, bearing closely against the edge of the barG. A dog or pawl, K, is pivoted to the lug L, upstanding and in- 5 5tegral with the bar G, designed to engage successively the teeth of thesaw and move the instrument alongv the blade one tooth at time. Aspring, 71, secured at one end to the lug L, holds the pawl inengagement with the 6o smv-tooth M is a lever pivoted on the barN, andhaving at its upper end the ringj, provided with the eccentric portion.lr., surroumling the journal c, which has the diametrically-oppositeproject-ions or lugs Z, designed at every halfrevolution of the journalto strike the eccentric 7s and throw the lower end of the lever forward,so that the pin M thereon will strike against the end of the extension Jand carry 7o the setting-instrument along the saw by the engagement ofthe pawl of the slide with a tooth of the saw-blade, said blade beingheld in a vise. The coiled spring fn., secured at one end to the bar G,and at its opposite end to the bed-plate ll, returns the parts to theirnormal position when a lug t shall have passed the eccentric.

The collar I is adjustable on the bar G, an d is designed to be set bythe grad nation-marks 8o thereon to suit the length of the tooth of thesaw on which the instrument is being operated. The slide-bar G and itspawlare moved vby the collar according to the adjustment of the latter,and the collar is operated by the stroke of the lever M against theextension or portion K, whereby the stroke of the pawl is governed.After the stroke the slide-bar, op` erated by its spring, returns toposition.

N designates a thrower-plate pivoted on 9o the pin o, projecting fromthe side plate, A, and having a lug, p, at its upper end projecting intothe cam-groove a of the roller O, so that when the roller is operatedthe plate N is reciprocated to carry the set-disk Oi, which is alsojournaled on the pin q, and secured to the plate N by means of thecoupling-pin r, projected through an opening in said plate, and any oneof the series of openingssin the disk that may be required to bring anyone Ioo of the lseries of set-notches t in the periphery of the disk tooperate upon the saw-teeth. The said notches t are of different widthsand properly numbered, so that the saw-teeth may be set at the requiredangle.

It is evident that the revolving of the roller C will impart avibra-tory motion to the setdisk, so that one side of the notch inengagement with the saw-teeth will set the tooth in one direction, andthe next tooth will be oppositely set when the opposite side of thenotch cornes in contact therewith, the blade being moved forward, asheretofore explained.

A height-guide, R, is provided with a slotopening, yn, to engage on thethreaded bolt t', extending from the bed-plate, so that it may be movedup or down to bring its inwardlyturned flange w to the height requiredto regulate the passage ot' the instrument over the saw-teeth, itbeingheld as adjusted by the thumb-nut The height-guide flange moves onthe tops of the teeth as the instrument is fed along the blade andregulates the height oli'k the instrument with reference to the notch ofthe thrower-plate.,

AHaving described my invention, what l claim is l. In a saw-set, thecombination, with the crank, the cani on its shaft, and the pivotednotched thrower-plate t'or setting the teeth, of theintermittently-operating lever, the feedpawl, and the adjustable devicesregulating its stroke, substantially as specified.

2. The combination, with the side plate having the bearings, o'i theroller having the cam-groove, the pivoted plate N, having it-s endextended into said cam-groove, the pivoted` set-disk, and theoperating-crank, substantially as specified.

The combination of the side plate, A, having the bearings, the rollerjournaled in said bearings and having the annular calngroove, the crank,the pivoted plate having* the lug extend ed into the cam-groove, thepivoted set-disk secured to said plate, and the guide-plate D, havingthe bolt extended through an opening in the side plate, substantially asspecified.

al.. The combination, with the side plate, A, having the transversebearing portion, the pivoted plate N, and the set-disk, of the rollerhaving the cam-groove, thelugs on its extended journal, the pivotedlever M, having the eccentric within its ring end and the pin on itsopposite end, and the graduated bar and the pawl pivoted thereon,substantially as specified.

In combination with the bearing-plate A, the cam-groove roller, thepivoted plate engaging the pivoted set-disk, and the pivoted lever M,the graduated bar seated in the grooved lateral bed-plate, thespringcontrolled pawl pivoted to the bar, the yokehaving the extension,the thumb-screw, andI the returning spring, substantially as spe'oiied..

G. In a saw-set, the combination, with the slide-bar, theintermittinglyiacting lever, and the operating mechanism, of theheight-guide having the slot-opening and the inwardlyproj ect-ing`portion, and the fastening-screw, substantially as specified.

7. In a saw-set, the combination, withl a notched oscillatingthrowerplate for setting' the teeth, the adjustable height-guide,as'lidebar carrying a 'feeding-pawl, and an intermittently-actingstroke-lever, of a shaft having a turning-crank, and carrying devices tooperate said thrower-plate and lever, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

lVILLIAM TRABUE. lVitnesses:

WILLIS W. BARNEs, GUY C. SIBLEY.

